ENGLISH
REFERENCE

oak

n. · adj.
US //ˈoʊk// UK //ˈəʊk// oak
  1. 1 the tree (n.)
    A2 Elementary Science

    a large tree that has leaves with rounded shapes and produces small nuts called acorns.

    any tree of the genus Quercus, characterized by lobed leaves and the production of acorns.

    Example

    We sat under the old oak in the park to stay out of the sun.

    Example

    The ancient oak stood as a landmark in the village for centuries, its massive root system supporting a canopy that sheltered generations of locals.

  2. 2 the wood (n.)
    B1 Intermediate

    the hard, strong wood from an oak tree, often used for floors or furniture.

    the durable, high-density timber derived from oak trees, valued for its strength and prominent grain pattern.

    Example

    The dining table is made of solid oak and is very heavy.

    Example

    The architect specified white oak for the flooring to ensure the surface would withstand heavy foot traffic while maintaining a light aesthetic.

    Usage

    Often used uncountably when referring to the material.
  3. 3 made of oak (adj.)
    B1 Intermediate

    describes something made from the wood of an oak tree.

    composed of or constructed from oak timber.

    Example

    She bought a beautiful oak cabinet for her new kitchen.

    Example

    The library was lined with heavy oak shelving that reached from the floor to the ornate ceiling.
  4. 4 the color (n.)
    B2 Upper Intermediate

    a medium to light brown color, like the wood of an oak tree.

    a moderate yellowish-brown color resembling the natural hue of seasoned oak wood.

    Example

    The walls were painted a warm oak to match the furniture.

    Example

    The designer chose a palette of oak and cream to create a natural, earthy atmosphere in the master bedroom.
  5. 5 college door (n.)
    C2 Proficiency British English Archaic

    the outer wooden door of a room in some old British universities.

    the outer, lockable door of a set of rooms in a college, particularly at Oxford or Cambridge.

    Example

    He closed his oak so he could study for his exams without being disturbed.

    Example

    In keeping with university tradition, the student decided to sport his oak, signaling to his peers that he was not accepting visitors.

    Teacher's tip

    This sense is almost exclusively found in literature about Oxford or Cambridge University life.

Idioms1 entry

Last updated June 19, 2026